Message transmission to external unit in radio apparatus

A selective call radio receiver with an external connection function, comprising

• a connection section to which an external unit is connected;
• a normal message storage section for storing normal messages;
• a transfer message storage section for storing transfer messages;
• a control section for classifying a reception message into said normal message and said transfer message based on a header data of said reception message to store in one of said normal message storage section and said transfer message storage section in accordance with the classification, and for transferring said transfer message from said transfer message storage section to said external unit through said connection section in response to a transfer instruction;
• and
• an output section for outputting an alarm in response to an alarm instruction wherein said control section checks a usage ratio of said transfer message storage section, and output said alarm instruction to said output section, when said usage ratio is equal to or more than a predetermined value.